|Katholikon of the Monastery of Osios Loukas
The monastery lies on the west slope of Mt. Helikon, below the acropolis of ancient Steirion. It is enclosed by a wall and comprises two- and three-storeyed blocks of cells, a bell-tower at the SW corner, the Refectory on the south side and the two adjoining churches, at the centre of the enclosure.
The smaller church, dedicated to the Theotocos, was built in the 10th century. It is the earliest known example of the four-column, cross-in-square type, it has a spacious, two-column narthex on the ...